摘要
随着计算机技术的发展,基于拓扑优化技术的轻量化设计在结构设计领域广泛运用.从目前的空间结构领域来看,针对具体项目的连续体结构的拓扑优化主要还是靠工程师的工作经验来进行,而采用系统性的优化策略来进行结构优化还并不成熟,尚待深入研究.六杆四面体球面网壳是一种包含装配式建筑思想的新型空间壳体,近年来进行了广泛深入的研究.本文基于应变能最小准则针对这种新型网壳结构的力学性能进行了截面尺寸优化,对优化前后网壳各个方向的位移及各杆件截面尺寸的变化进行分析研究.优化结果表明,在减重百分之二十的条件下,结构刚度有了较大提高,竖向位移得到了有效控制,自动化的拓扑优化技术在新型空间结构体系上得到了较好的实现.
With the development of computer technology,lightweight design based on optimization topology is widely used in construction.Nevertheless,the application of optimization is still based on engineer＇s work experience.Systematic optimization strategies are in urgently requirement.In recent years,a novel lattice shell composed of six-bar tetrahedral unit was proposed with extensive analysis of its mechanical properties.This paper focuses on the light weight investigation of the lattice shell design by optimizing the cross-sectional dimensions of the bars and beams.In comparing and analyzing the displacement of the structure in each direction and the change of the cross-sectional dimension of each bar before and after optimization,the structural stiffness are improved by twenty three percent,and the vertical displacement is effectively controlled,under the condition that the weight is reduced by twenty percent.The optimization technology has been proved a good realization in spatial structure.
作者
周一一
夏聪
白光波
陈联盟
ZHOU Yi-yi;XIA Cong;BAI Guang-bo;CHEN Lian-meng(School of Civil Engineering and Architecture,Changzhou Institute of Technology,Changzhou 213000,China;Beijing Institute of Architectural Design,Beijing 100045,China;School of Architecture and Civil Engineering,Wenzhou University,Wenzhou 327000,China)
出处
《空间结构》
CSCD
北大核心
2018年第3期20-24,31,共6页
Spatial Structures
基金
国家自然科学基金项目(51678082,51578422)
关键词
球面网壳
六杆四面体单元
结构拓扑优化
轻量化设计
spherical lattice shell
six-bar tetrahedral unit
structural topology optimization
lightweight design
